Trimming capacitor

Abstract

A trimming capacitor wherein its trimming direction has no directivity. The trimming capacitor comprises a dielectric ceramic sheet provided with a trimming capacitor electrode on the surface thereof, a dielectric ceramic sheet provided with internal capacitor electrodes on the surface thereof, and other sheets. Regions where the trimming capacitor electrode overlaps with the internal capacitor electrodes are disposed so as to be linearly symmetrical about a base line which is inclined by 45° with respect to a long side of the trimming capacitor. Therefore, the trimming electrode can be trimmed in the same way in either the X or the Y direction of the trimming electrode.

What is claimed is: 
     
       1. A trimming capacitor, comprising: a ceramic dielectric;   a trimming capacitor electrode provided on said ceramic dielectric; and   a pair of internal capacitor electrodes provided within said ceramic dielectric which face said trimming capacitor electrode so as to generate electrostatic capacitance;   regions where said trimming capacitor electrode overlaps with said internal capacitor electrodes being disposed so as to be linearly symmetrical about a base line which is inclined by 45° to an external side of said trimming capacitor.   
     
     
       2. The trimming capacitor according to claim 1, wherein said trimming capacitor is square and one internal capacitor electrode of said pair of internal capacitor electrodes is electrically connected with external electrodes provided on two adjoining side faces of said trimming capacitor and the other internal capacitor electrode is electrically connected with external electrodes provided on the two remaining adjoining side faces of said trimming capacitor. 
     
     
       3. The trimming capacitor according to claim 2, wherein said trimming capacitor electrode and said internal capacitor electrodes are disposed so as to be symmetrical in the direction of thickness of said trimming capacitor. 
     
     
       4. The trimming capacitor according to claim 1, wherein said trimming capacitor electrode and said internal capacitor electrodes are disposed so as to be symmetrical in the direction of thickness of said trimming capacitor. 
     
     
       5. The trimming capacitor according to claim 1, wherein said trimming capacitor electrode is on a surface of said ceramic dielectric. 
     
     
       6. The trimming capacitor according to claim 1, wherein said trimming capacitor electrode is within said ceramic dielectric. 
     
     
       7. The trimming capacitor according to claim 1, wherein said trimming capacitor electrode is square. 
     
     
       8. The trimming capacitor according to claim 1, wherein said overlap regions have the shape of a triangle. 
     
     
       9. The trimming capacitor according to claim 1, wherein said overlap regions have the shape of a rectangle. 
     
     
       10. The trimming capacitor according to claim 1, wherein said overlap regions have the shape of a circular segment.